solution to bash error (because of the PATH)

由于修改了/etc/bash.bashrc时，将PATH变量中路径设置错误（路径拼写错误，呵呵，低级错误），所以当再次打开bash时，出现

Command 'lesspipe' is available in '/usr/bin/lesspipe'

The command could not be located because '/usr/bin' is not included in the PATH environment variable.

bash: lesspipe: command not found

Command 'dircolors' is available in '/usr/bin/dircolors'

The command could not be located because '/usr/bin' is not included in the PATH environment variable.

bash: dircolors: command not found

Command 'uname' is available in '/bin/uname'

The command could not be located because '/bin' is not included in the PATH environment variable.

bash: uname: command not found

Command 'uname' is available in '/bin/uname'

The command could not be located because '/bin' is not included in the PATH environment variable.

bash: uname: command not found

bash: [: !=: unary operator expected

bash: [: too many arguments

bash: [: too many arguments

bash: [: =: unary operator expected

bash: [: too many arguments

bash: [: too many arguments

bash: [: too many arguments

bash: [: too many arguments

bash: [: too many arguments

bash: [: too many arguments

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: =: unary operator expected

bash: [: too many arguments

bash: [: =: unary operator expected

Command 'sed' is available in '/bin/sed'

The command could not be located because '/bin' is not included in the PATH environment variable.

bash: sed: command not found

xuqiang@ubuntu:~$



下面解决方案：

首先成为超级用户（ubuntu）

/usr/bin/sudo -i（必须是绝对路径）

/usr/bin/nano /etc/bash.bashrc



删除掉错误信息就可。